The short story goes like this: the EU decided that MS was to make public the specifications of some protocols and formats for allowing interoperability of Windows with other OSs. MS decided that this would be bad for their monopoly, so refused. Later, they pretended to comply, by sending the EU 30k pages of basically bullshit (for practical purposes, that documentation was useless). Now, the EU has decided that we should take none of it, and has fined MS for not complying.